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Description of problem:

Shenandoah's traversal mode is currently experimental. We would like to officially support it. In order to do so, we need to ramp up testing and address a number of outstanding issues.

What will be required  to test this? We are running churn. Maybe to run it with some magical switch? Or do you have some better test?

We have ramped up our testing, fixed a number of minor issues around Shenandoah#s traversal mode and have removed the 'experimental' denotion of traversal mode in our development repository. Everything except the removal of experimental flag has already been backported to our Shenandoah jdk11 integration repository, and the removal of experimenatal flag will land there too, soon. At that point it will be ready to go into our next openjdk11 release.

I'll update this bug.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:1088